Question: What is the island nation with the lowest marriageable age whose member of is United Nations Educational, Scientific and Cultural Organization?
Paraphrase: Which island nation of the United Nations Educational, Scientific and Cultural Organization has the lowest marriageable age?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q112099 . ?ent wdt:P3000 ?obj . ?ent wdt:P463 wd:Q7809} ORDER BY ASC(?obj)LIMIT 5 
Answer: Saint Vincent and the Grenadines, Japan, Indonesia, Palau, Nauru